轴流风机叶片裂纹的非线性研究

Nonlinear Study on the Blade Crack of Axial Fan

针对某一型号轴流风机叶片裂纹的情况,用ANSYS有限元法对叶片进行了刚强度、应力分布及轴向位移的计算,通过对比分析叶片应力-时间函数曲线,得出应力集中加快裂纹扩展结论.同时,分析了导致出现裂纹和叶片断裂的多种因素,提出了控制叶片裂纹的对策,使叶片裂纹得到了有效的控制.

To the condition of a certain type of blade crack of axial fan, it applied large -scale finite element ANSYS software, accounted the intensity, stress distributing and the axial displacement. Through the analysis stress - function of time curve of the blade, we obtained the conclusion that concentration of stress can speed up the expansion of the crack. At the same time, we analyzed many kinds of factors of the blade breaking and crack, then proposed some correlation suggestions to avoid the appearing of similar phenomenon and control the blade crack.